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1. Coastal Aerial Photography from the National Ocean Service (NOS) National Geodetic Survey (NGS) available through NOS MapFinder [NOS_MAPFINDER_COASTAL_PHOTO]
Precision aerial photography is collected by the National Ocean Service (NOS) National Geodetic Survey (NGS) Remote Sensing Division for the production of coastal survey maps. The georeferenced, ...


2. Polar Motion Information [OES_GL_POLAR_MOTION]
The POLARIS (Polar Motion Analysis by Radio Interferometric Surveying) network monitors the location of the Earth's axis of rotation using the method of Very Long Baseline Interferometry (VLBI). ...


3. National Oceanic and Atmospheric Administration (NOAA) Hurricane Katrina Images [NOAA_KATRINA]
The imagery posted on this site is of the Gulf coast of Louisiana, Mississippi and Alabama after Hurricane Katrina made landfall. Please note that these images are uncorrected ...


4. National Geodetic Survey's (NGS) Coastal Survey Maps [NOS_NGS_COAST_SURV_MAP]
Coastal survey maps, also known as T-Sheets, serve as the basic database of shoreline and topography used in the production of nautical charts. Historical data from these surveys are often used in ...


5. Aerial Photographs from NOAA/National Ocean Service [CGS_NCD_AERIAL_PHOTO]
Aerial Photographs and field survey data provide the basic data base for compiling coastal survey maps. The photographs consist of natural color, color infrared, black-and-white (panchromatic), and ...


6. Calibration Base Line Program from NOAA/National Geodetic Survey [CGS_NGSD_CBL]
A calibration base line (CBL) is a precisely measured, straight-line course of approximately 1,400 m used to calibrate Electronic Distance Measuring Instruments (EDMI). A CBL usually consists of four ...


7. Computed Geoid Heights and Deflections from the Vertical [CGS_NGSD_GEOID90_OSU89_DFLC90]
The National Geodetic Survey (NGS) has computed both a high-resolution geoid model (GEOID90) and a high-resolution deflection model (DEFLEC90) for the United States. Both are referred to the Geodetic ...


8. Gravimetric Information from NOAA/National Geodetic Survey [CGS_NGSD_GRAVIMETRIC]
Gravimetric Information shows the local acceleration of gravity. The intensity of gravity can be predicted for any location within the continental United States. These predicted values are available, ...


9. Horizontal and Vertical Location Datums, and Related Data Products [CGS_NGSD_NAD83_NADV88_MISC]
The National Geodetic Survey (NGS) is responsible for establishing, developing, and maintaining the National Geodetic Reference System (NGRS). NGRS comprises approximately 1 million precisely located ...


10. National Geodetic Survey (NGS) National Spatial Reference System (NSRS) Geodetic Control Point data available from National Ocean Service (NOS) MapFinder [NOS_MAPFINDER_NGS_CNTRL_PTS]
The National Spatial Reference System (NSRS), maintained by the National Geodetic Survey (NGS), is a consistent national coordinate system that defines latitude, longitude, elevation, scale, gravity, ...


11. NAVSTAR Global Positioning System (GPS) Orbital Data [CGS_NGSD_GPS_ORBITS]
The National Geodetic Survey (NGS) provides precise orbital positions and velocities for the NAVSTAR Global Positioning System (GPS) satellite constellation. This data is computed from satellite ...


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